King Engine Bearings MB5505XP STDX MB5505XPSTDX King Main Bearings for Domestic Vehicles
Additional Shell Thickness
King offers 3 levels of main bearings for use in OE Stock,
High Performance, and Extreme Performance applications. King main
bearings are sold in engine sets.
AM-Series & SI-Series
King AM-Series & SI-Series bearings are recommended for OE
applications. AM-Series bearings are aluminum-copper-tin plus Alloy
on high-strength steel (Bi-Metal). SI-Series bearings are
Silicon-Aluminum bearings (Bi-Metal) are designed for
Aftermarket Gasoline or Diesel Engine Rebuilding &
Performance Engines with OE Crankshafts.
King HP-Series bearings are recommended for street and strip high
performance applications. These Bi-Metal Silicon Aluminum bearings
are designed for blown, turbocharged, NOS, and alcohol-fueled
engines using aftermarket crankshafts. These bearings have
chamfered oil holes are fit aftermarket cranks machined with a
large radii at the edge of the journals. Most main bearings in the
HP-Series are 3/4 grooved for improved oiling to the rod journals.
Ideal for use in High Load, Short Duration Applications like
Drag Racing, Tractor Pulling, Monster Trucks, etc.
King XP-Series bearings are for extreme performance in high-load
capacity applications. These Tri-Metal copper lead bearings are
designed use on cranks with large radii (narrow rod bearings) and
feature enlarged, chamfered oil holes with 1/2 grooving (on most
main bearings) for uncompromised lower bearing load capacity. Ideal
for use in High Load Circle Track & Endurance
What does the King part number Prefix/Suffix
NOTE: The term "Undersize" refers to a thicker bearing which
is used when the Crankshaft has been turned down and is now
undersized, not the bearing itself. The term "Oversize" is
typically a thinner bearing than stock to allow for increased
Select your application below.
Chevy: Small Block,LS,400ci,Big Block
Chrysler: 318/340ci,426 Hemi/440ci
Ford: 289/302ci , 351C , 351W , 4.6L SOHC (Cast Iron Block)
, 4.6L SOHC/DOHC (Aluminum Block) , 4.6L/5.4L SOHC Windsor ,
429/460 Big Block
Main Bearing Set
- Ford 351 Windsor Small Block
- .001" Oversize